Community build: update cats-effect to latest upstream

Use withDottyCompat for dependencies that are not yet in the
community build.

Author: griggt

community-build/community-projects/cats-effect-2

@@ -346,7 +346,8 @@ object projects:
 
   lazy val catsEffect3 = SbtCommunityProject(
     project        = "cats-effect-3",
-    sbtTestCommand = "testIfRelevant"
+    sbtTestCommand = "test",
+    dependencies   = List(scalacheck)
   )
 
   lazy val scalaParallelCollections = SbtCommunityProject(

community-build/community-projects/cats-effect-3

@@ -102,9 +102,8 @@ end CommunityBuildTestA
 class CommunityBuildTestB extends CommunityBuildTest:
   @Test def algebra = projects.algebra.run()
   @Test def betterfiles = projects.betterfiles.run()
-  // temporarily disabled due to lampepfl/dotty#10478
-  //@Test def catsEffect2 = projects.catsEffect2.run()
-  //@Test def catsEffect3 = projects.catsEffect3.run()
+  @Test def catsEffect2 = projects.catsEffect2.run()
+  @Test def catsEffect3 = projects.catsEffect3.run()
   // Temporarily disabled until problem discovered in comments to #9449 is fixed
   // @Test def dottyCpsAsync = projects.dottyCpsAsync.run()
   @Test def effpi = projects.effpi.run()